Mold



March 21, 1933. w KEMP 1,902,559

MOLD

Filed Dec. 5, 1931 3 Shets-Sheet 1 hill m mzzm/zr Marhh 21, 1933. w.KEMP MOLD 3 Sheets-Sheet 2 Filed Dec. 3, 1931 l. t 3 nu. fi mm mm. \Nmmm March 21, 1933. 'w E KEMP v 1,902,559

MOLD

Filed Dec. 5 1931 V s Sheats-Shet a Z. l g 4 16;!

mag/W2? mold of Figure 1.

tion to chill.

Patented Mar. 21, 1933 wrLLmn: n. or xonouo, mnrnm, assrenon.

BATION, OF KOKOHO, INDIANA,

zro xmesron rnonucrs coma conrona'rron-or, mmnu HOLD Application filedDecember 3 This invention relates to molds and particularly to a moldfor casting small metallic objects such as valve tappets having locahzedhardened portions or faces.

Articles of manufacture, such as automobile tappets, require a tou h,strong body and a hard, wear-resisting h ad. Many valve tappets are now,produced which are formed of composite metalysuch tappets usuallycomrising .a'steel bod having a cast iron head. guch composite tappetsare costly to manufacture and this prohibits their use in moderatepriced automotive engines.

It is the purpose of the present invention to provide'a new,advantageous and economlcal method of making a valve tagipet.

To this end, it is an object this invenprovide a mold having an attachedIt is a particular object of this invention to provide a mold having amovable chill attached thereto.

It is a further particular object of this invention to provide a moldhaving achill plate movabl mounted in a reservoir containing a coo ingmedium so as to enable a fresh surface to be employed in makingsuccessive castings.

These and other objects of this invention will beapparent from thefollowing description and claims.

This invention (in a preferred form) is illustrated in theaccompanyingegrawmgs and hereinafter more/fully descri On the drawings:4

F'gure 1 is'a plan view of a mold embodyin the features of thisinvention.

igure 2 is a side elevational view of the Figure 3 is a sectional viewtaken approximately on the line III-III of Figure 1 with a art inelevation. I y

igure 4 is a sectional-view taken approximately on-thp line IV -IV ofFigure 1,. withparts in elevatio Figure 5 is a bottom plan view ofachill used with themold ofthis invention.

As shown on the drawings:

The molding apparatus of this invention comprises a base 1 formed ofcast iron or ,1981. Serial so. 570,048.

other similar material, and having apertured ears 1 for securing thebase to any suitable in s pe and has an annular reservoir or dfipression2 therein adjacent the outer peri ery thereof. A boss 3 is formed at themi dle of the reservoir 2. The boss 3 is provided with a recess 4inwhich there is journaled a veatical pivot 5. x

he upper portion of the pivot 5 is reduced and threaded as formed ofcast iron, at 8, and threadedon on the boss 3. The plate 7 acts as achill plate for the mold, as will later be explained, and for, thispurpose is provided with a number of fins 9 which project downwardlyfrom the under surface thereof and dip into the reservoir 2. Thereservoir 2 is provided with an inlet pipe 10 and an outlet pipe 11 forciigiz llillatgng cooling fluid therethrough.

is recessed centrally as 12 hav ng an internally threaded recess or bore13.- A bolt 14 is threaded into the recess 13 and mold 15 is preferablymade of cast iron and compr ses sections 16 and 17, each of which isbolted at one end to a hinge piece 18. The hinge pieces having upper andlower proectmg tongues which are ap'ertured to re ceive the pivot bolt14. I

The op site ends of the sections 17 and 16 areprovi ed with'bifurcatedmembers 19 and 20, respectively, bolted thereto as at 21. The bifurcatedmember 19 is provided with a vertical aperture 22 which receives a bolt23 for ivotin-g a hasp 24 thereto. The has 24 may swung so as tobereceived by the bifurcated member and when in such position the hasp24 extends beyond the bifurcated member 20. The extending end of thehasp 24. is provided witha handle 25 which is plvoted thereto asby-thepin 26. Thehandle 25 is govided with a cam surface 27 which mayswung against the'bifurca-ted member 20 12,. The pro ection 28 isprovided with a suppgrt. The base 1 is preferably cylindrical at'6. Acircular plate 7 also 7 the pivot 5 so as to rotate ase 1 is providedwith an extension ser ves as a pivot for a mold 15. The

i to lock the hasp in place and thereby prevent 55 ,of'hardnessnecessary in articles of the type mentioned. After the article has.

1 bore29 extending upwardly from the bottom ternally J'the mold sections16 and- 17.

. section thereof. At its upper end, bore 29 has an inthreaded portion30 alined with an internally threaded recess 31 in the bottom of themold section17. A bolt 32 is threaded through the portion 30 into therecess 31 to holdthe section 17 of the mold against relative movementwith respect to the base 1."

The section 16 of the mold is free when the hasp is in unlocked positionto rotate about the pin 14. w I

The adjacent faces of the mold sections 16 and 17 are provided with comlementary recesses 33 and'34 respectively orming, when the mold sectionsare in engaging position, airlticle' forming cavities 35. The number ofthe size of the mold 15 and for convenience the mold has beenillustrated as having four bf these cavities. I I

, The mold cavities take the sha e of the article to be formed and thelower en s thereof are open to the chill plate 7, as illustrated at 36.The article formin cavities are also pro-- maintain the mold sections inpr oper position during the pouring of the metal. I

In using this molding, apparatus for forming-metal articles such astappets,the 'iron which is to be cast into the a'rtlce is poured inthechamber 39 and allowed to flow through the conduits 38 and fill thearticle forming chill plate. For venting cavities 33. As the loweropening of each cavity 33 is adjacent the chill plate 7 the metal in themold cavities 33 will contact this any trapped gases or air, a slightspacing 7 is left between the upper surface of'the chill plate and thebottom of the mold. T,his spacing is regulable "by rotating the chillplate onthe threaded pivot 5 and inserting suitable shims between theplate 7 and the boss 3. As is well known, this sudden chilling of theend of the cast article causes the end to have the high degree beencast, the section 16 of the mold is swung away from the sec tion 17 andthe cast metal removed therefrom. v I I The metal articles are thenbroken from the metal formed in the conduits 38 and are ma chined to theproper In order to prevent the chill plate 7 from ese' article formingcavities depends upon.

finish.

- base, means for mamtalnmg one of said'secbeing heated to such anextent as to be inop' erative, it is but necessary to swing it about itspivot 5 after each pouring so as to present a new and chilled section atthe base of the pouringcav-ities. The fins 9 extending into thereservoir 2 serve to conduct the heat away from the upper surface of theplate which is in contact with the mold 15.

It will be seen by this invention there is provided novel apparatus formaking valve tappets which enables one to produce a. good quality valvetappet at a very economical cost.

The provision of a permanent mold together with a-movabe chill plateenables the 'casting operation to be carried on without considerabledelay betweenpourings.

I It will be understood that many ichanges may be made in thearrangement of the parts herein set out without departure from thisinvention, and I do not wish to be limited otherwise than is necessaryby the prior' art and the scope of the appended claims.

I claim as my invention I lxApparatus for forming metal articles havingportions of different degrees of hard;

ness,'compr1s1ng a mold having a number of article forming cavities, abase'havinga fluid reservoir, a chill plate pivotallymounted on saidbase and having a portion thereof directly below said mold and fins onsaid chill plate extending in said reservoir.

2. A molding apparatus comprising a base,

' a permanent mold proper formed in separate sections, pivotally mountedon said base and 10 0 havin matched recesses in, abutting faces proviing mold cavities anda chill plate rotatably mounted in said base, saidchill plate forming a bottom closure for said mold cavities.

3. A molding'apparatus comprising a base, having a. fluid reservoirtherein, a permanent mold proper formedin separate sections pivotallymounted on said base, said mold proper having matched recesses in'abutting faces providing mold cavities, a chill plate 'movably mountedonsaidbase and closing the lower ends of said cavities, and finsextending downwardly from the bottom of said chill plate into the fluidreservoir.

4. A moldingv apparatus comprising a base 5. A molding apparatuscomprising a base I having a fluid reservoir therein, a permanent havingan annular fluid reservoir therein,

a moldproper comprising sections hinged" to each other and pivotallymounted on said tions rigidly attached to said base, said mold sectionshaving complementary recesses in abutting faces thereof forming moldcavities when said faces are in abutting relation, said mold having apouring chamber and conduits connecting said mold cavities, lookingmeans on said mold sections for maintalning the adjacent faces inabutting relation, alining means on said sections for properlypositioning said complementary recesses, a chill plate movably mountedon said base, said chill plate closing the lower ends of said moldcavities and a plurality of fins extending downwardly from said chilljplate into said reservoir for dissipating the heat from said chillplate.

6. A moldin apparatus for forming cast metal articles liaving portionsof different degrees of hardness, comprising a base, an incomplete moldhaving an article forming cavity and chill means rotatably mounted onsaid base, a portion. of the chill means form-, ing a closure for thebottom of said cavity, said chill means being slightly spaced from themold to permit of the venting of trapped gases or air.

7 Apparatus for forming metal articles having portions of differentdegrees of hardness, comprising a base, a two-part mold having a numberof article forming cavities therein attached to said base and a chillplate mounted on said base and movable relative to said mold, said chillplate being disposed beneath the two part mold and forming a bottom forthe forming cavities and being slightly spaced from the mold to permitofthe venting of trapped gases or air.

8. Apparatus for molding metal articles comprising a base, a two-partmold having article forming cavities therein mounted on said base, oneof said parts being pivoted to said base to swing horizontally into andout of engagement with the other part and a chill plate movably mountedon said base,

successive portions of said chill late serving as closures for thebottoms 0 said mold cavities.

9. Apparatus for molding metal articles said mold having a reservoirtherein provided with means for flowing water therethrou h and a chillplate pivotally mounted on sai support beneath said mold, said chillplate being revolvable to 'present portions thereof as closures for thebottoms of said mold cavities, and having fins extending therefrommovable in the reservoir.

12. A molding apparatus comprising a base, a permanent mold properattached to said base, said permanent mold proper being formed inseparable sections having matched recesses in abuttin faces cavities,and a chil plate or forming the bottom closure of the mold cavities,said chill platebeing rotatably mounted on said base.

In testimony whereof I have hereunto subroviding mold scribed my name atChicago, Cook County, 7

Illinois.

WILLIAM E. KEMP.

comprising a permanent mold having article formingcavities, a supportfor said mold and chill means rotatably mounted on said support belowsaid mold and disposed such that upon rotation, successive portions forma bottom for the cavities.

10. Apparatus for molding metal articles comprising a permanent moldhaving mold cavities with open bottoms, a support for said mold providedwith a reservoir for cooling means, and chill means secured to saidsupport. and movable in said reservoir, said chill means forming aclosure for the bottoms of said mold cavitles.

11.- Apparatus for moldin metal articles comprising a permanent mo (1having mold cavities'with open bottoms, a support for

